/Engine/Plugins/Importers/USDImporter/Source/UnrealUSDWrapper/Public/UsdWrappers/ForwardDeclarations.h
Minimal pxr::SdfLayer pointer wrapper for Unreal that can be used from no-rtti modules. Use the aliases FSdfLayer and FSdfLayerWeak instead (defined on ForwardDeclarations.h)
template<typename PtrType> class FSdfLayerBase